package com.heima.search.service.impl;

import cn.hutool.core.util.StrUtil;
import com.alibaba.fastjson.JSON;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;

import com.heima.model.search.dto.UserSearchDto;
import com.heima.model.user.pojo.ApUser;
import com.heima.search.service.ApUserSearchService;
import com.heima.search.service.ArticleSearchService;

import com.heima.utils.common.AppThreadLocalUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.index.query.*;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.sort.SortOrder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

@Service
@Slf4j
public class ArticleSearchServiceImpl implements ArticleSearchService {

    @Autowired
    private RestHighLevelClient restHighLevelClient;
    @Autowired
    private ApUserSearchService apUserSearchService;

    /**
     * es文章分页检索
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult search(UserSearchDto dto) throws IOException {

        // 1.检查参数
        if(dto == null || StrUtil.isBlank(dto.getSearchWords())){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        ApUser user = AppThreadLocalUtil.getUser();

        //异步调用 保存搜索记录
        if(user != null && dto.getFromIndex() == 0){
            apUserSearchService.insert(dto.getSearchWords(), user.getId());
        }

        // 2.设置查询条件
        SearchRequest searchRequest = new SearchRequest("app_article");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();

        // 布尔查询
        BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();

        // 关键字的分词之后查询
        QueryStringQueryBuilder queryStringQueryBuilder = QueryBuilders.queryStringQuery(dto.getSearchWords()).field("title").field("content").defaultOperator(Operator.OR);
        boolQueryBuilder.must(queryStringQueryBuilder);

        // 查询小于mindate的数据
        RangeQueryBuilder rangeQueryBuilder = QueryBuilders.rangeQuery("publishTime").lt(dto.getMinBehotTime());
        boolQueryBuilder.filter(rangeQueryBuilder);

        // 分页查询
        searchSourceBuilder.from(0);
        searchSourceBuilder.size(dto.getPageSize());

        // 按照发布时间倒序查询
        searchSourceBuilder.sort("publishTime", SortOrder.DESC);

        // 设置高亮  title
        HighlightBuilder highlightBuilder = new HighlightBuilder();
        highlightBuilder.field("title");
        highlightBuilder.preTags("<font style='color: red; font-size: inherit;'>");
        highlightBuilder.postTags("</font>");
        searchSourceBuilder.highlighter(highlightBuilder);


        searchSourceBuilder.query(boolQueryBuilder);
        searchRequest.source(searchSourceBuilder);
        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);


        // 3.结果封装返回
        // 查询参数
        // 搜索条件
        // SearchRequest request = new SearchRequest("app_article");
        // // 搜索条件
        // BoolQueryBuilder bool = QueryBuilders.boolQuery();
        // bool.should(QueryBuilders.matchQuery("title",dto.getSearchWords()));
        // // bool.should(QueryBuilders.matchQuery("content",dto.getSearchWords()));
        // // bool.filter(QueryBuilders.rangeQuery("publishTime").lt(dto.getMinBehotTime()));
        // request.source().query(bool);
        // // 排序
        // request.source().sort("publishTime",SortOrder.DESC);
        // // 分页
        // request.source().from(0);
        // request.source().size(dto.getPageSize());
        // // 设置高亮
        // request.source().highlighter(new HighlightBuilder().field("title")
        //         .preTags("<font style='color: red; font-size: inherit;'>")
        //         .postTags("</font>"));
        // // 发送请求
        // SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT);
        // // 解析结果 todo
        return ResponseResult.okResult("");

        // List<Map> list = new ArrayList<>();
        //
        // SearchHit[] hits = searchResponse.getHits().getHits();
        // for (SearchHit hit : hits) {
        //     String json = hit.getSourceAsString();
        //     Map map = JSON.parseObject(json, Map.class);
        //     // 处理高亮
        //     if(hit.getHighlightFields() != null && hit.getHighlightFields().size() > 0){
        //         Text[] titles = hit.getHighlightFields().get("title").getFragments();
        //         String title = StringUtils.join(titles);
        //         // 高亮标题
        //         map.put("h_title",title);
        //     }else {
        //         // 原始标题
        //         map.put("h_title",map.get("title"));
        //     }
        //     list.add(map);
        // }
        //
        // return ResponseResult.okResult(list);

    }
}